406532666 has 8 divisors (see below), whose sum is σ = 610649280. Its totient is φ = 202982908.

The previous prime is 406532639. The next prime is 406532681. The reversal of 406532666 is 666235604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139916 + ... + 142791.

It is an arithmetic number, because the mean of its divisors is an integer number (76331160).

Almost surely, 2^406532666 is an apocalyptic number.

406532666 is a deficient number, since it is larger than the sum of its proper divisors (204116614).

406532666 is a wasteful number, since it uses less digits than its factorization.

406532666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283428.

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 406532666 is about 20162.6552318885. The cubic root of 406532666 is about 740.7957510035.

The spelling of 406532666 in words is "four hundred six million, five hundred thirty-two thousand, six hundred sixty-six".